You have multiple problems as far as I can tell. Plenum and cat first. The tranny could be a more simple problem. But, you have to start somewhere.

 

could be bad gas for the misfire..try some gas treatment..also could be the stuff Zman mentioned... they are common weaknesses to our dodges..
also there are lots of p1740 threads on here...its also a common issue ..use the search option and you will find all you need to know fast...

 

Check plug wire routing. There is a TSB for it in the faq section.

Hows the cap and rotor?

when was the last time the trans was serviced?

 

Not as fast as getting spoon fed and being lazy is . LOL

 

Thanks Zman, I was also thinking that. I was wondering tho if i take the cat out and run it, would i be able to tell if that was it or would the o2 sensors act up? Im really hoping I dont have to dig in and take care of the plenum, sounds like a pain in the ***!! Maybe i should just throw dual exhaust on at this point, it would cost about the same as just taking care of the cat haha

Thanks augiedoggy lol, I know the gas is good because I fill it up alot haha due to the misfires but i usually only go to BP if theres one around and here and there ill fill up with silver if the price is the same. I have also put additives in as well but after i had the injectors looked at I just settled for silver at the right price.

Just noticed too that driver side valve cover is missing a bolt on one of the grille side corners and on the back by windshield side looks like there might be a leak or might have been a leak, not sure it doesn't look to fresh but its also dirty. Im gonna try and clean it up, put a new bolt in and watch it for a couple days. No fluids are low and so far no ground drips that ive ever seen.

Tranny Shop said.......

I brought it into a few different shops but it seems that no matter the severity of the transmission problem they all seem to push for a rebuild, which im not apposed to doing but i just dont have the cash right now. Ive been told that both the solenoids were out or going out (dont know much about them) but will check out the threads. Was also told that my tranny was cleaned out prior to me buying it, but he still came out with a hand full of metal shreds that filled up his cupped palm. Im not really sure if he's full of it and thats just a pile from a different tranny. So far the solenoids are just causing the tranny to shift funny, but unless im being aggressive on the throttle it doesn't happen at all. There is no slip or grind at all, and ive owned 3 vehicles with trannys that went out, its very smooth and gears all feel good it just seems like it gets confused on what gear to switch into and when. It does a gear shift then back to previous gear and then it settles back in the higher gear, its just a back and forth thing thats pretty quick. Even pulling loads feels good just the occasional tranny confusion. So I was really wondering if this truly does sound like a rebuild or if I just took care of the solenoid if that would be good enough.

 

TO HEYYOU The plugs are new today, the wires were new a few months ago and same for the cap and rotor. Still looks good tho. Have never had the tranny serviced, i haven't had it that long and just figured out about the issues a few months ago and haven't had the money. Im not a believer in tranny flush's either, it seems to many times it results in the tranny getting worse because of the pressure pushing the little pieces around in the tranny and finding homes where there not welcome. I know of people having really good luck as well and running an original tranny upwards of 300,000 miles before any problems. Firing order is all correct also

 

I bet the torque converter is failing and causing those metal pieces in the tranny.... were they magnetic or aluminum? should have checked...thats what happened to mine recently.
I also have a mis that hasnt thrown a single code in almost 200miles but I got it to pop a few times today while working it in overdrive today...I also replaced my cap rotor plugs and wires and such so it looks like my problem might be head related at this point...I'm not a happy camper.. at this rate their wont be anything left I havent rebuilt or replaced in the last 10,000 miles.

 

So after all day of diagnostics and exhausting all the small things, I started reading about mass air flow sensors going bad on other vehicles and there symptoms were the exact same as mine. lack of power, bad acceleration, low mpg, and sketchy cold weather operation. Sounded to a T what was going on but now come to learn that my motor doesn't have a MAF sensor. ugh!!! Any ideas if the 2nd gen 360 has something close or something in a different name that acts the part of a mass air flow sensor? Sorry guys I am reading the other threads but its nice to get other opinions on specific problems im having, this is the first dodge ive owned and I havent had it very long so im still learning the ins and outs of dodge. Like always tho, much appreciation to the help. Im not really concerned about the transmission problems right now until i get some extra cash, i just need these mis fires figured out before i have a very nice and large driveway obstacle. Unless the tranny is related to the mises. Now onto the next most likely candidate, the cat converter and then the plenum I guess..... Hopefully there is a sensor like the MAF. I called dodge to find out but he wouldnt do any kind of diagnostic or related issues over the phone.

 

Wouldn't hurt to drop the pan, and see what you find. If the trans still shifts ok and such, might be able to just replace some solenoids, and be good to go again for a while. Depends on what you find in the pan....

 

Things I've Done Recently

Ok so now I opened up my throttle body and looked into the butterfly's and there is a small amount of residue but its not yellowish and its not slick. I reached my finger in as far as I could but the residue was black and gritty, and only had the smell of gas. No signs of anything else. I hope thats a good thing.

I also sprayed around near the throttle body and vacuum lines with carb cleaner to see if i could get a reaction but nothing happened. Also a good sign i hope.

What I'm Thinkin

Now i'm lead to believe that its going to be either the cross fire problem which i am going to go out right now to reroute per tsb or the catalytic converter and/or o2 sensors.

Is there any other ways to tell if the converter is going? I dont have a thermal gun to use for temp.

Exhaust

I felt the flow of exhaust and its coming out pretty strong but kind of in a puff like manner. Instead of smooth its a puff puff puff puff. No funny smells as well except the occasional smell of gas, which was why I was maybe thinking the fuel pump but why would it choose cylinder 5 to pick on and none of the other ones? Underneath I looked at the cat and there is a outer shell like cover around it that is coming off on one side but is holding on the other, like its a 2 ply metal or something. Underneath is still pretty strong metal (puff puff puff, pin hole and misfire in the exhaust are all different sounds) My other concern was that it seems like i can hear a pin hole leak or a couple in the exhaust on or right near the cat but i cant feel or spot any holes. Cat looks pretty rusty but overall not too bad. Would one of these problems lead anyone to believe it would throw a cylinder 5 and only 5 and why would it choose that one? I've been reading that cylinder 5 and 8 especially, or/along with, the entire pass side plugs can be a good indication of the plenum but I don't thing so in this case.

Thanks guys, any ideas or comments are always appreciated. I really hope this will also help someone else out, what a pain in the *** chasing these misfires. Especially when the pocket book doesn't agreeing with the spending haha